I've been using the Most Popular module because I haven't been able to find anything else, but that only has ~750 odd users spread between the D6 and D7 versions. Surely popular content is a fairly-common requirement? That leads me to believe there's a better maintained (and hopefully less buggy) module that does the exact same thing, just it has an obscure name and I can't find it via Google. If so, what is it?

(If you're going to crucify me for asking for an alternative module, note that I've contributed several issues and a documentation patch for Most Popular, and have volunteered to contribute code patches. However, there hasn't been a single commit on that module in ~6 months.)